Home / 540,133.20-809,681.40-420,123.60

Finding the Fourth Proportional to 540,133.20, 809,681.40 and 420,123.60

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Solution

The fourth proportional to 540,133.20, 809,681.40 and 420,123.60 is: 629,782.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,133.20 : 809,681.40 = 420,123.60 : x
  2. Step 2: Convert to fraction form
    540,133.20/809,681.40 = 420,123.60/x
  3. Step 3: Cross multiply
    540,133.20x = 809,681.40 × 420,123.60
  4. Step 4: Simplify right side
    540,133.20x = 340,166,264,621.04
  5. Step 5: Solve for x
    x = 340,166,264,621.04/540,133.20
  6. Step 6: Final answer
    x = 629,782.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.